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fixed DPD null state bug

This commit is contained in:
Andreas Steffen 2009-03-30 03:47:14 +00:00
parent ab6923f28c
commit 79b2729490
4 changed files with 16 additions and 4 deletions
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10
NEWS
View File

@ -5,6 +5,16 @@ strongswan-4.2.14
relays EAP messages to and from a RADIUS server. Succesfully
tested with with a freeradius server using EAP-MD5 and EAP-SIM.
- A vulnerability in the Dead Peer Detection (RFC 3706) code was found by
Gerd v. Egidy <gerd.von.egidy@intra2net.com> of Intra2net AG affecting
all Openswan and strongSwan releases. A malicious (or expired ISAKMP)
R_U_THERE or R_U_THERE_ACK Dead Peer Detection packet can cause the
pluto IKE daemon to crash and restart. No authentication or encryption
is required to trigger this bug. One spoofed UDP packet can cause the
pluto IKE daemon to restart and be unresponsive for a few seconds while
restarting. This DPD null state vulnerability has been officially
registered as CVE-2009-0790 and is fixed by this release.
- ASN.1 to time_t conversion caused a time wrap-around for
dates after Jan 18 03:14:07 UTC 2038 on 32-bit platforms.
As a workaround such dates are set to the maximum representable

8
src/pluto/ipsec_doi.c
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@ -5446,9 +5446,9 @@ dpd_inI_outR(struct state *st, struct isakmp_notification *const n, pb_stream *p
time_t tm = now();
u_int32_t seqno;
if (!IS_ISAKMP_SA_ESTABLISHED(st->st_state))
if (st == NULL || !IS_ISAKMP_SA_ESTABLISHED(st->st_state))
{
loglog(RC_LOG_SERIOUS, "DPD: Received R_U_THERE for unestablished ISKAMP SA");
loglog(RC_LOG_SERIOUS, "DPD: Received R_U_THERE for unestablished ISAKMP SA");
return STF_IGNORE;
}
if (n->isan_spisize != COOKIE_SIZE * 2 || pbs_left(pbs) < COOKIE_SIZE * 2)
@ -5516,10 +5516,10 @@ dpd_inR(struct state *st, struct isakmp_notification *const n, pb_stream *pbs)
{
u_int32_t seqno;
if (!IS_ISAKMP_SA_ESTABLISHED(st->st_state))
if (st == NULL || !IS_ISAKMP_SA_ESTABLISHED(st->st_state))
{
loglog(RC_LOG_SERIOUS
, "DPD: Received R_U_THERE_ACK for unestablished ISKAMP SA");
, "DPD: Received R_U_THERE_ACK for unestablished ISAKMP SA");
return STF_FAIL;
}

1
src/pluto/vendor.c
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@ -242,6 +242,7 @@ static struct vid_struct _vid_tab[] = {
DEC_MD5_VID(STRONGSWAN_4_0_1, "strongSwan 4.0.1")
DEC_MD5_VID(STRONGSWAN_4_0_0, "strongSwan 4.0.0")
DEC_MD5_VID(STRONGSWAN_2_8_8, "strongSwan 2.8.9")
DEC_MD5_VID(STRONGSWAN_2_8_8, "strongSwan 2.8.8")
DEC_MD5_VID(STRONGSWAN_2_8_7, "strongSwan 2.8.7")
DEC_MD5_VID(STRONGSWAN_2_8_6, "strongSwan 2.8.6")

1
src/pluto/vendor.h
View File

@ -94,6 +94,7 @@ enum known_vendorid {
VID_STRONGSWAN_2_8_6 = 72,
VID_STRONGSWAN_2_8_7 = 73,
VID_STRONGSWAN_2_8_8 = 74,
VID_STRONGSWAN_2_8_9 = 75,
VID_STRONGSWAN_4_0_0 = 80,
VID_STRONGSWAN_4_0_1 = 81,